You recently discovered a new element, and find that this particular element has one electron its outer energy level. What would you expect will happen to an atom of this element if placed in water?
A. It will gain an electron forming a positive ion.
B. It will lose an electron forming a negative ion.
C. It will lose an electron forming a positive ion.
D. It will gain an electron forming a negative ion.
C
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The warmest area of a lake during the summer is the ________.
A. limnion B. hypolimnion C. thermocline D. epilimnion E. benthic zone
In an Asian rice paddy, carp eat decaying material from around the base of rice plants while a snail scrapes algae from the leaves, stems, and roots of the same plant. They can survive at the same time in the same rice paddy because they occupy
A. different habitats and different niches. B. the same habitat and the same niche. C. the same habitat but different niches. D. the same niche but different habitats.
German measles is caused by the ________ virus.
A. coxsackievirus A B. herpes-zoster C. reovirus D. rubella
Type I survivorship curves
a. are characteristics of humans and elephants. b. typify a population in which all ages have an equal chance of survival. c. indicate a high mortality rate in the very young. d. show that very few young are produced, that each is given parental support, and that most individuals live a relatively long life and die of old age. e. are typical of annual plants